JP2008205696A - Ip telephone system and ip telephone terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a call is disconnected when a main device goes out of order due to a certain cause concerning a distribution processing method for converting a processing load in the main device into a function module. <P>SOLUTION: A call management function is shared by division into a plurality of telephone sets concerning a telephone system composed of the telephone sets. When a fault occurs in the telephone set sharing the call management function, the shared call management function is shifted to the other telephone set so as to restore the fault. The call management function is divided into extension line management, external line management, and setting value management as division units. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an IP telephone system and an IP telephone terminal, and relates to an IP telephone system and an IP telephone terminal which are configured by an IP telephone terminal including a call control server function, and which share and share functions among a plurality of telephones. is there.

  The IP telephone system includes a SIP server on the Internet provided by a provider, a main device connected to the SIP server, and a plurality of terminals under the main device. The main device described in Patent Document 1 is a main device set in an office, is expensive, and its installation space cannot be ignored.

JP 2005-184192 A

  An object of the present invention is to distribute the call control processing conventionally performed by the main apparatus to each IP telephone terminal and to construct an IP telephone system with only the IP telephone terminals. Another object is to provide an IP telephone terminal for this IP telephone system.

  The above problem comprises a plurality of IP telephone terminals connected to a network, and the IP telephone terminal has distributed call control execution means for executing call control to be shared in cooperation with other IP telephone terminals, Among IP telephone terminals, predetermined IP telephone terminals cooperate with each other to perform distributed processing of call control of the telephone system, and each IP telephone terminal can select one of the predetermined IP telephone terminals according to the content of a command related to outgoing / incoming calls. This can be achieved by an IP telephone system that transmits a command related to the incoming / outgoing call.

  In addition, it has distributed call control execution means for executing call control to be shared in cooperation with other IP telephone terminals, and the distributed call control execution means has a distributed call control program for executing call control to be shared. A plurality of IPs including own IP telephone terminals in cooperation with other IP telephone terminals via a network, having distributed call control program storage means for storing and call control data storage means for storing data relating to distributed call control; This can be achieved by an IP telephone terminal that performs call control of the telephone terminal.

  According to the present invention, there is no need for a dedicated main apparatus or call control server apparatus, and the installation space can be saved.

  Hereinafter, embodiments of the present invention will be described using examples with reference to the drawings. The same reference numerals are assigned to substantially the same parts, and the description will not be repeated. Here, FIG. 1 is a block diagram of an IP network. FIG. 2 is a functional block diagram of the IP telephone terminal. FIG. 3 is a functional block diagram of the distributed shared IP telephone system. FIG. 4 is an initial startup sequence diagram of a terminal operating as an outside line control terminal. FIG. 5 is an initial startup sequence diagram of a terminal operating as a temporary registration terminal. FIG. 6 is a sequence diagram for explaining outside line transmission. FIG. 7 is a sequence diagram for explaining extension transmission. FIG. 8 is a sequence diagram for explaining an outside line incoming call. FIG. 9 is a diagram for explaining extension management data. FIG. 10 is a diagram for explaining the outside line management data.

  First, an IP telephone network in which a plurality of IP telephone terminals are installed will be described with reference to FIG. In FIG. 1, an IP telephone network 600 includes an external telephone terminal 70 connected to a WAN 60, an SIP server 80, an external network connection device (gateway) 50, a LAN 40 connected to the gateway 50, and a distributed shared IP connected to the LAN 40. The telephone system 500 is configured. The distributed shared IP telephone system 500 includes an external line control terminal 10-1 that controls an external line call with the WAN 60, an internal line control terminal 10-4 that controls an internal line call between IP telephone terminals connected to the LAN 40, and various setting values. Set value management terminal 10-7 and other IP telephone terminals 10-2, 10-3, 10-5, 10-6, 10-8, 10-9. The reference numbers of IP telephone terminals that do not constitute these control / management terminals are hereinafter referred to as 10, 10-A and 10-B.

  The external line control terminal 10-1 is in charge of the external line function, controls outgoing / incoming calls to the distributed shared IP telephone system 500, manages the call state at the time of outgoing / incoming calls from the IP telephone terminal 10, and sets the carrier set on the WAN 60. Management of connection (registration registration) to the SIP connection service to the SIP server 80 is performed. Here, the outside line control terminal 10-1 distributes the processing to the IP telephone terminals 10 other than the control / management terminal in accordance with the number of registrations that can be registered in the SIP server 80. The IP telephone terminals 10-2 and 10-3 perform registration registration processing in conjunction with the external line control terminal 10-1 when making an incoming / outgoing call to the SIP server 80 according to an instruction from the external line control terminal 10-1. Performs call control processing. In the following description, an IP telephone terminal requested to perform distributed processing from the outside line control terminal 10-1 is referred to as a temporary registration terminal.

  The extension control terminal 10-4 is in charge of an extension control function, and performs an extension call control process for an extension number and searches for an IP address of a partner extension number when making or receiving an extension. Further, when a new call (IP packet transmission / reception by two-way call) is added to the LAN 40, the call quality on the LAN 40 is checked to determine whether the call is possible. Further, although not shown, the line status LED is managed. Here, the LED is a line key LED of each IP telephone terminal 10 and controls the LED according to the status of each telephone terminal of the distributed shared IP telephone system 500.

  The extension control terminal 10-4 is registered as a backup terminal when there is an IP telephone terminal other than the control / management terminal and the IP telephone terminal of the temporary registration terminal, that is, an IP telephone terminal that does not perform distributed processing. May be. Specifically, when the IP telephone terminal 10-5 is instructed by the extension control terminal 10-4 as a backup terminal, it operates as a backup terminal and monitors the communication state of the extension control terminal 10-4. When the extension control terminal 10-4 becomes difficult to connect to the network due to some trouble such as a failure, the backup terminal activates the extension control function, registers the address of its own terminal in all IP telephone terminals, Operates as a new extension control terminal.

  The set value management terminal 10-7 has a function of managing general data of all IP telephone terminals 10. IP address, commonly used phone book, registrar information of SIP server 80 All IP phone terminals 10 are assigned and assigned an extension number or group number separately from the IP address and managed. Further, the set value management terminal 10-7 may be registered as a backup terminal when there is an IP telephone terminal other than the control / management terminal and the provisional registration terminal, like the extension control terminal 10-4. Specifically, the IP telephone terminal 10-8 and IP telephone terminal 10-9 are used as backup terminals, and the updated information is periodically updated every time the currently set value is updated. 8. Transmit to IP phone terminal 10-9. The IP telephone terminals 10-8 and 10-9 that have received the update information store the update information and operate as backup terminals.

  The hardware configuration of the IP telephone terminal 10 will be described with reference to FIG. 2, the IP telephone terminal 10 includes a communication control unit 100, a telephone function unit 110, a distributed call control function unit 120, a man-machine interface unit 130, and a voice input / output unit 140.

  The telephone function unit 110 includes a terminal control unit 111, an input / output processing unit 112, a call processing unit 113, and a terminal data registration unit 114.

Further, the distributed call control function unit 120 includes a distributed call control unit 121, a distributed call control program storage unit 122, and a distributed call control data storage unit 123.
Here, the distributed call control function unit 120 processes differently depending on the function of the control / management terminal. In the present embodiment, the IP telephone terminal 10 stores all the programs of all functions distributed in constructing the IP telephone system in the distributed call control program storage unit 122 in advance, and automatically makes a determination by itself. A case will be described in which a function to be controlled / managed is selected and activated according to an instruction from the set value management terminal. Similarly, set value management data described later is stored in advance.

  Although not described in the present embodiment, in order to reduce the memory area of the distributed call control program storage unit 122 to be stored, it may have only a program or data of any one function. When only one of the program data is stored, a method of storing the stored program data by each IP telephone terminal 10 at the factory shipment stage is conceivable. Alternatively, a download-dedicated server that transfers programs and data to be stored according to terminal information may be installed on the network, and the IP telephone terminal 10 may transmit its own terminal information to the server and download it from the download-dedicated server. Good.

The man-machine interface unit 130 is a number input / control input button, a display unit, an incoming call speaker, and the like.
The telephone communication unit 140 is a receiver, and includes a receiver speaker and a transmitter microphone.

  The communication control unit 100 connects the distributed call control 121 and the terminal control unit 111, and performs transmission / reception processing of voice packets transmitted and received by the IP telephone terminal 10 connected to the LAN 40. The communication processing unit 113, the terminal control unit 111, and communication control This is performed in cooperation with the unit 100. The communication control unit 100 extracts the data part of the received packet addressed to its own terminal and passes it to the distributed call control unit 121. When the data is passed from the distributed call control unit 121, the communication control unit 100 adds the destination. Packetized and transmitted to the LAN 40. Similarly, when the communication control unit 100 receives a telephone control packet such as a call packet addressed to the IP telephone terminal 10 received from another IP telephone terminal 10, the communication control unit 100 extracts a data portion and passes it to the terminal control unit 111. When data is passed from the control unit 10, the destination is added to form a packet, which is transmitted to the LAN network 40.

  The terminal control unit 111 is a block that performs general IP telephone function processing. The terminal control unit 111 is connected to the communication control unit 100, the entry / exit processing unit 112, the call processing unit 113, and the terminal data registration unit 114, and the processing result is input / output processing unit 112, call processing unit 113, terminal data registration according to the data content. When data is received from the input / output processing unit 112, the call processing unit 113, and the terminal data registration unit 114, the processing is performed, and the data is transferred to the communication control unit 100.

  In the present embodiment, the control units of the terminal control unit 111 and the distributed call control unit 121 have been described by dividing them into functions, but the two call control units may be integrated into a main control unit. In this case, the main control unit processes the data passed from the communication control unit 100 by the main control unit, and distributes the processing result to each block.

  The input / output processing unit 112 connects the terminal control unit 111 and the man-machine interface unit 130, and transmits data to the terminal control unit in response to detection of an input from the man-machine interface unit 130. Further, the input / output processing unit 112 sends the data to the man-machine interface unit 130 according to the output data received from the terminal control unit 111.

  The call processing unit 113 is a voice codec that connects the terminal control unit 111 and the voice input / output unit 130. The call processing unit 113 encodes the voice input from the transmission microphone and passes the encoded voice to the terminal control unit 111. The voice generated by decoding the voice data passed from is delivered to the terminal receiving speaker.

  The terminal data registration unit 114 is connected to the terminal control unit 111 and stores information necessary for a telephone function such as a personal phone book / call history or as a telephone function service, and is called from the terminal control unit 111 as necessary. .

  The distributed call control unit 121 is connected to the communication control unit 100, the distributed call control program storage unit 122, and the distributed call control data storage unit 123, and performs processing related to distributed call control when activated as each control / management terminal. When the distributed call control unit 121 receives data from each control / management terminal via the communication control unit 100, the distributed call control unit 121 processes the data according to the data, and the processing result is transmitted to the communication control unit 100, the distributed call control program storage unit 122, the distributed call. The data is transferred to the control data storage unit 123.

The distributed call control program storage unit 122 stores the above-described control / management terminal function program and other set value information, and loads the program of any one of the control / management terminal functions after power-on.
The distributed call control data storage unit 123 is a memory area when activated as each control / management terminal. The distributed call control data storage unit 123 stores each function data and processes each function in conjunction with the distributed call control unit 121.

  Next, referring to FIG. 3, the distributed call control function storage unit 120 in which each program for the control / management function is stored in the distributed call control program storage unit 122 of the IP telephone terminal 10 is connected to the extension control terminal 10- 1. Operation starting from the external line control terminal 10-4 and the set value management function unit 10-7 until the distributed shared IP telephone system 500 is constructed will be described. In FIG. 3, first, when an IP telephone terminal 10 is newly connected to the LAN 40, the telephone function unit 110 of the IP telephone terminal 10 is activated as an IP telephone terminal. Further, the distributed call control unit 121 of the IP telephone terminal 10 loads the setting value management program from the distributed call control program storage unit 122 and starts as the setting value management terminal 10-7. In addition, setting value management data stored in the distributed call control data storage unit 123 in the same manner in the distributed call control program storage unit 122 is loaded into the distributed call control data storage unit 123.

  Next, when the IP telephone terminal 10 is newly connected, the extension number is registered as the IP telephone terminal in conjunction with the set value management terminal 10-7, and the telephone function is activated. Further, in response to an instruction from the set value management terminal 10-7, the IP telephone terminal 10 activates the external line control program from the distributed call control program storage section 122 by the distributed call control unit 121 of the IP telephone terminal 10 and the external line control terminal 10-1. Works as. The distributed call control unit 121-1 detects the connection of another IP telephone terminal 10 and generates external line management data in the distributed call control data storage unit 123.

  Furthermore, when a new IP telephone terminal 10 is connected, a predetermined extension number is registered in the setting value management program as an IP telephone terminal in conjunction with the setting value management terminal 10-7, and the telephone function is activated. Further, in response to an instruction from the set value management terminal 10-7, the IP telephone terminal 10 activates the extension control program from the distributed call control program storage unit 122 and the extension control terminal 10-4. Works as. The distributed call control unit 121-1 detects the connection of another IP telephone terminal 10 and generates extension management data in the distributed call control data storage unit 123.

In the present embodiment, when the setting value management terminal is activated, the external line control terminal is activated and the extension control terminal is activated. However, the activation order of the external line control terminal and the extension control terminal is activated first. May be.
In the present embodiment, the case where the new IP telephone terminal 10 connected to the LAN 40 operates as each control / management terminal according to the power-on sequence has been described. However, according to the MAC address of each IP telephone terminal and the IP address. It may be determined in advance.
Similarly, the extension number assignment method may be assigned by MAC address or IP address.

  When each control / management terminal is activated, the outside line control terminal 10-1 updates the outside line management data, and links to the SIP server 80 installed on the WAN 60 via the GW 50 in conjunction with the set value management terminal 10-7. Connection is performed and registration registration processing is performed, and the distributed shared IP telephone system 500 is constructed.

  Next, using FIG. 4 and FIG. 5, the construction until the IP telephone terminal 10 that has loaded the program of each control / management terminal described in FIG. 3 and started as the control / management terminal constructs the distributed IP telephone system. The method will be further described with reference to a sequence diagram.

First, the IP telephone terminal 10 of this embodiment will be described on the assumption that a unique IP address is assigned in advance. As a method for automatically setting the IP address setting, IP address automatic assignment by DHCP may be performed before performing this sequence.
When the new IP telephone terminal 10-7 is connected to the LAN 40 and powered on, the distributed call control unit 121 transmits a set value management terminal search command using the set IP address as a transmission source. The set value management terminal search command is performed by multicast transfer or broadcast transfer, and it is confirmed that there is no set value management terminal on the LAN 40.
In addition, the IP telephone terminal 10 has a timer function in the distributed call control unit 121 and times out when a certain time elapses. For example, when the timeout control time is set to 3 seconds and the timeout occurs, the program of the setting value management function is loaded from the distributed call control program storage unit 122 to operate the own IP telephone terminal as the setting value management terminal, and the setting value Start the management function. Furthermore, the setting value management data stored in advance in the setting value management function program is loaded into the distributed call control data storage unit 123, and the distributed call control unit 121 waits until the next IP telephone terminal is connected. The set value management data means any data such as register information of the SIP server 80 (a user name and password for registration registration, which will be described later with reference to FIG. 10), a server address of the SIP server 80, and other telephone books.

Next, referring to FIG. 4, with the setting management terminal 10-7 activated, the IP telephone terminal 10-4 is newly connected to the LAN 40 on the LAN 40, and the IP telephone terminal 10-1 is turned on. Then, the distributed call control unit 121 of the IP telephone terminal 10-1 performs a setting value management terminal search command in the same manner as the setting management terminal 10-7 (T101). The set value management terminal search command performs multicast or broadcast transmission. Further, the IP telephone terminals 10 other than the setting value management terminal 10-7 do not operate even when receiving the setting value management terminal search command transmitted by multicast. The setting value management terminal 10-7 that has received the setting value management terminal search command transmits a response command to notify the new IP telephone terminal 10-1 that the setting value management terminal 10-7 exists. (T102). The new IP telephone terminal 10-1 that has received the response command transmits specific ID information such as an IP address and a MAC address to the set value management terminal 10-7 as its own terminal information (T103). The set value management terminal 10-7 that has received the own terminal information packet refers to the set value management data in the distributed call control unit data storage unit 123, searches for the presence / absence of the control terminal, and confirms that there is no control terminal. To do. The setting value management terminal 10-7, which has confirmed that there is no control terminal, determines that the IP telephone terminal 10-1 is an external line control terminal.
Then, the set value management terminal 10-7 notifies the assigned extension number as terminal data to the IP telephone terminal 10-1 (T104).

  The IP telephone terminal 10-1 that has received the terminal data registers the extension number of the terminal itself in the telephone function unit 110, activates the telephone function, and starts the operation as the IP telephone terminal (T105). Further, the set value management terminal 10-7 notifies the IP telephone terminal 10-1 of the register information to the SIP server 80 and the IP address of the SIP server 80 as control terminal data (T106). Upon receiving the register information and the IP address of the SIP server 80, the IP telephone terminal 10-1 starts an external line control program from the distributed call control program storage unit 122 (T107), and further manages the external line in the distributed call control data storage unit 123. Generate data. Although not shown, the IP telephone terminal 10-1 that has received the register information performs registration registration with the SIP server 80.

The IP telephone terminal 10-1 that has completed registration registration is activated as an outside line control terminal, and transmits that registration registration has been completed to the setting value management terminal 10-7 as a distributed call control terminal registration notification (T108). Upon receiving the control terminal registration notification, the set value management terminal 10-7 registers the external line control terminal 10-1 as an external line control terminal together with the extension number and IP address assigned to the set value management data, and registers the external line control terminal 10-1 with the external line control terminal 10-1. The completion of external line group registration is notified (T109). The distributed call control unit 121 of the external line management terminal 10-1 and the set value management terminal 10-7 that has received the registration completion notification waits until the next IP telephone terminal is connected. When entered, the terminal registration process is performed as an extension control terminal in the same manner as the outside line control terminal registration. The extension control terminal does not perform registration registration. When the control / management terminal completes the setting, each control / management terminal starts operating as a telephone system.

  Next, referring to FIG. 5, with each control / management terminal connected to the LAN and constructed as a distributed IP telephone system 500, the IP telephone terminal 10-2 is newly connected and the IP telephone terminal 10-2 is connected. The sequence will be described until the terminal operates as a temporary registration terminal of the outside line control group. When a new IP phone terminal 10-2 is newly connected to the LAN and powered on, the IP phone terminal 10-2 multicasts a set value management terminal search command (T201). The set value management terminal 10-7 that has received this transmits a response command to the IP telephone terminal 10-2 (T202). The IP telephone terminal 10-2 that has received the response command packet transmits its own terminal information to the setting value management terminal 10-7 (T203). The set value management terminal 10-7 that has received the own terminal information refers to the set value management data and confirms that there are an external line control terminal and an extension control terminal. Also, from the IP address or MAC address of the terminal information, it is determined that IP telephone terminal 10-2 is a temporary registration terminal subordinate to external line control terminal 10-1. Then, the set value management terminal 10-7 notifies the IP telephone terminal 10-2 of the assigned extension number as terminal data (T204).

  The IP telephone terminal 10-2 that has received the terminal data registers the extension number of the own terminal in the telephone function unit 110, activates the telephone function, and starts the operation as the IP telephone terminal (T205). Further, the set value management terminal 10-7 notifies the IP telephone terminal 10-2 of the register information to the SIP server 80 and the IP address of the SIP server 80 as temporary registration terminal data (T206). The IP telephone terminal 10-2 that has received the temporary registration terminal data performs registration registration with the SIP server 80 (T207). Since the registration method is a known technique using the SIP protocol, the description thereof is omitted. The external line control terminal 10-2 that has completed registration is in a standby state in the same manner as the external line control terminal 10-1.

  The set value management terminal 10-7 that has transmitted the temporary registration terminal data notification indicates to the external line control terminal 10-1 that the IP telephone terminal 10-2 is a temporary registration terminal together with the assigned extension number. A notification is sent (T208). The external line control terminal 10-1 that has received the temporary registration terminal notification updates the external line management data (T209) and manages the subsequent state of the temporary registration terminal 10-2.

  With reference to FIG. 6, a description will be given of outgoing call transmission from the IP telephone terminal 10 connected to the IP telephone system to the external telephone terminal 70 using the external line of the temporary registration terminal 10-2, using a sequence diagram. The IP telephone terminal 10 that has detected the off-hook transmits an off-hook notification to the extension control terminal 10 (T301). The extension control terminal 10-4 that has received the off-hook notification registers that the IP telephone terminal 10 is in the extension call state in the extension management data (T302), and a new voice call has been made in the network state on the LAN 40. In this case, it is determined whether or not the call quality can be secured (T303). Specifically, the communication speed of the LAN 40 is measured and it is determined whether or not it is below a specified value (for example, 50 Mbps).

  If it is determined that the call quality can be ensured, the extension control terminal 10-4 transmits a call ready notification to the IP telephone terminal 10 (T304). When the IP telephone terminal 10 receives the call ready notification, the IP telephone terminal 10 rings the SDT and enters a user dial operation input standby state. If an external line supplement operation such as an external line button is detected here, the IP telephone terminal 10 transmits an external line supplement request to the external line control terminal 10-1 (T306). The external line control terminal 10-1 that has received the external line supplement request distributes the external line processing to the temporary registration terminal 10-2 according to the data of the external line supplement request or when the external line control terminal 10-1 is in use, and temporarily registers it. An unregistration request for requesting cancellation of registration registration registered by the terminal 10-2 is transmitted (T307).

  The temporary registration terminal 10-2 that has received the unregistration request performs unregistration processing using the SIP protocol on the SIP server 80 (T308). Since the unresist process is a known technique using the SIP protocol technique, the description of the process is omitted. The temporary registration terminal 10-2 that has completed the unregistration process deletes the registration information registered by the temporary registration terminal 10-2 and the address of the SIP server 80 from the external line control terminal 10-1, and the unregistration process. Is transmitted to the outside line control terminal as an unregistration notification (T309). The external line control terminal 10-1 that has received the request transmits a registration request for requesting registration to the IP telephone terminal 10 together with the registration information registered by the temporary registration terminal 10-2 and the address information of the SIP server 80. (T310). The IP telephone terminal 10 that has received the registration request starts registration processing for the SIP server 80 from the received SIP server address and registration information (T311). Since the resist process is a known technique using the SIP protocol technique, the description of the process is omitted. When registration processing is completed, IP telephone terminal 10 transmits registration completion notification to outside line control terminal 10-1 as registration notification (T312).

  The external line control terminal 10-1 that has received the registration notification updates the external line management data assuming that the IP telephone terminal 10 is in an external line call (T313). When registration is completed, the outside line control terminal 10-1 transmits to the IP telephone terminal 10 that outside line supplementation has been completed as an outside line thinness notification (T314). The IP telephone terminal 10 that has received the external line supplement notification starts DT ringing and enters a user dial operation input standby state. If the user's number input is detected, connection processing with the SIP server 80 is started with the detected number (T316). Since the connection process is a known technique using the SIP protocol, the description of the process is omitted. When the connection is completed, the call starts (T317). When the call is finished and on-hook is performed, IP telephone terminal 10-1 performs unregistration in the reverse procedure to outgoing line transmission, temporary registration terminal 10-2 performs registration registration again, and shifts to a standby mode.

  Next, using FIG. 7, an extension call is made from any two IP telephone terminals 10-A to the IP telephone terminal 10-B, and processing up to the call will be described with reference to a sequence diagram. The steps from T401 to T405 in FIG. 7 are the same as the steps from T301 to T305 in FIG.

  When the user dials the extension number of the IP telephone terminal 10-B after the SDT ringing, the IP telephone terminal 10-A transmits it as a dial notification to the extension control terminal 10-4 together with the extension number (T406). Upon receiving the dial notification, the extension control terminal 10-4 searches the IP address of the destination IP telephone terminal 10-B from the received extension number and extension management data (T407), and the IP telephone terminal 10-A and the IP telephone The extension management data of the terminal 10-B is updated during the extension call (T408). Further, the extension control terminal 10-4 notifies the IP telephone terminal 10-A of the searched IP address as destination information (T409). The telephone terminal 10-A that has received the destination information performs a SIP transmission sequence with the IP telephone terminal 10-B based on the received destination information (T410), and starts a call (T411).

  A sequence of processing up to a call when a distributed IP telephone system is constructed and an incoming call is received from an external telephone terminal 70 to a predetermined IP telephone terminal 10 in the IP telephone system 500 will be described with reference to FIG. Here, when making an outgoing call, the external telephone terminal 70 makes a call to the temporary registration terminal 10-2, attaches additional information for specifying the IP telephone terminal 10, and makes a DID call to the IP telephone terminal 10. Assumption.

  When the temporary registration terminal 10-2 receives the INVITE of the SIP sequence from the external telephone terminal 70, the temporary registration terminal 10-2 transmits 100TRYING and further transmits 180RINGING (T501). When the temporary registration terminal 10-2 transmits 180 RINGING, the temporary registration terminal 10-2 transmits an incoming call notification from the external telephone terminal 70 to the external line control terminal 10-1 together with the IP address of the external telephone terminal 70 (T502). . The external line control terminal 10-1 that has received the incoming call notification updates the state of the temporary registration terminal 10-2 in the external line management data (T503). The external line control terminal 10-1 that has received the incoming call notification searches the ringing IP telephone terminal 10 and forwards the received incoming call notification together with the telephone terminal 10 information ringing to the extension control terminal 10-4 (T504). The extension control terminal 10-4 that has received the incoming call notification from the external line control terminal 10-1 collates the additional information specifying the IP telephone terminal 10 included in the incoming call notification with the extension number of the extension management data, and starts ringing. It is determined whether or not the telephone terminal 10 is in a standby state (T505).

  Note that the IP telephone terminal that starts ringing this time will be described as DID incoming to the IP telephone terminal 10, but this is done manually for each temporary registration terminal or when the telephone terminal to be called to the outside line control terminal is newly connected to the temporary registration terminal. Is set. The set value management terminal 10-7 thus set transmits the setting information to the outside line control terminal 10-1, and the received outside line control terminal 10-1 stores the setting information in the outside line control terminal 10-4.

  When the IP telephone terminal 10 that starts ringing is in a standby state, the extension control terminal 10-4 transmits a terminal ringing request for requesting the start of ringing to the IP telephone terminal 10 (T506). The IP telephone terminal 10 that has received the request starts ringing (T507). The extension control terminal 10-4 that has transmitted the terminal ringing request updates the state of the IP telephone terminal in the extension management data (T508). When the IP telephone terminal 10 that has started ringing detects that the handset has been off-hooked by the user, the IP telephone terminal 10 transmits an off-hook notification to the extension control terminal 10-4 (T509). Steps T509 to T511 of the off-hook notification are the same as steps T301 to T303 shown in FIG.

The extension control terminal 10-4 that has confirmed the network status at T511 transmits to the IP telephone terminal 10 that it is possible to make a call together with the IP address of the temporary registration terminal 10-2 as a callable notification (T512). The IP telephone terminal 10 that has received the call availability notification transmits an external line transfer request for requesting the temporary registration terminal 10-2 to transfer the call of the external telephone terminal 70 to the IP telephone terminal 10 (T513). The temporary registration terminal 10-2 that has received the external line transfer request transmits an external line transfer start notification to the external line control terminal 10-1 (T514), transmits 200 OK to the SIP server 80, and uses the SIP protocol. The connection process with the SIP server 80 is resumed (T515). The external line control terminal 10-1 that has received the external line transfer start notification updates the external line management data (T516), and transmits the external line transfer notification to the internal line control terminal 10-4 (T517). The external line control terminal 10-4 that has received the external line transfer start notification updates the state of the temporary registration terminal 10-2 of the external line management data during a call (T518). The temporary registration terminal 10-2 in the call state shifts to a transfer process with the IP telephone terminal 10 using the SIP protocol (T519). Since the transfer process is a known technique using the SIP protocol technique, the description of the process is omitted.
When the transfer process is completed, a call between the IP telephone terminal 10 and the external telephone terminal 70 is started (T520).
In the present embodiment, the call processing at the time of outgoing line transmission is realized by repeating registration / unregistration in FIG. 6, but transfer in the SIP sequence may be used as shown in FIG. Specifically, when an outside line capturing operation is detected when an outside line is transmitted, the DT ringing is started, and when dial information of the dial operation is detected, the IP telephone terminal 10 performs a call to the temporary registration terminal 10-2 and further calls are made. Once established, it can be realized by automatically transferring to the IP telephone terminal 10. When the temporary registration terminal 10-2 transmits an incoming call notification and an external line transfer notification, the temporary registration terminal 10-2 notifies the external line control terminal 10-1, and the external line control terminal 10-1 notifies the internal line control terminal 10-2 of the incoming call. However, the temporary registration terminal 10-2 may directly transmit to the external line control terminal 10-1 and the internal line control terminal 10-4.

  Further, although not described in the present embodiment, when the status is confirmed in step T505, and when waiting, the extension control terminal 10-4 sends a terminal callable notification to the temporary registration terminal 10-2. The temporary registration terminal 10-2 that has transmitted and received this returns 200OK to the external telephone terminal 70 to establish a call. Furthermore, the temporary registration terminal 10-2 that has established the call may continue to transmit the hold sound to the temporary registration terminal 10-2 until step T515 is notified.

  The extension management data will be described with reference to FIG. The extension management data 1000 includes an extension number 1001, an IP address 1002, and a status 1003, and is managed as extension management data in the distributed call control data storage unit 123 of the extension control terminal 10-4. When the IP telephone terminal 10 is newly connected and receives the extension number and IP address together with the extension group registration notification from the setting management terminal 10-7, the line of the IP telephone terminal is generated in the extension management data, and the IP telephone terminal Are registered in the extension number 1001 and the IP address 1002 respectively. In addition, a standby state is registered in the status 10. In addition, when an incoming / outgoing call is made on an external line or an internal line, the status is updated according to the state of the IP telephone terminal.

  The outside line management data will be described with reference to FIG. The outside line management data 2000 includes a temporary registration terminal 2001, a status 2002, an outside line number 2003, a user name 2004, a password 2005, a use terminal 2006, a SIP server address 2007, and a ring request terminal 2008, and the distributed call of the outside line control terminal 10-1. It is managed as external line management data in the control data storage unit 123. The outside line number 2003, the user name 2004, and the password 2005 are the contents of registration information transmitted by the SIP server.

  The temporary registration terminal 10-2 is newly connected, and the setting management terminal 10-7 sends the control terminal data notification or the external line temporary registration data notification from the setting management terminal 10-7 and the IP address, extension number, and registration information of the temporary registration terminal. Is generated in the external line management data, and is registered in the external line number 1001 and IP address 1002 of the IP temporary registration terminal line, respectively. Also, registration information is registered in the outside line number 2003, user name 2004, and password 2005, and the SIP server address is registered in the SIP server address 2007, respectively. Further, when a new temporary registration terminal is connected to the ringing request terminal 2008, when the setting value management data of the setting management terminal 10-7 is registered, it is transferred from the setting value management terminal 10-7 and received. The outside line control terminal stores the transferred extension number.

  According to this embodiment, the user can construct a telephone system by simply connecting the required number of devices to the Internet. Further, when a telephone constituting the system breaks down, the function can be easily restored by shifting the function to another telephone.

In the above-described embodiments, the function for distributed management has been described as being divided into three: an external line control terminal, an extension control terminal, and a set value management terminal. However, the number of classifications for distributed management need not be three.
For example, various other functions such as a presence function, a mail function performed between IP telephone terminals, a recording function, a charging function, and an LED control function may be distributed. In addition, it is possible to increase the number of already activated terminals such as an external line control terminal and an internal line control terminal according to the scale of the telephone system to be constructed.

1 is a block diagram of an IP network. It is a functional block diagram of an IP telephone terminal. It is a functional block diagram of a distributed shared IP telephone system. It is an initial starting sequence diagram of a terminal operating as an outside line control terminal. It is an initial startup sequence diagram of a terminal that operates as a temporary registration terminal. It is an outside line transmission sequence diagram. It is an extension line transmission sequence diagram. It is an outside line incoming call sequence diagram. It is a figure explaining extension management information. It is a figure explaining outside line management information.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... IP telephone terminal, 40 ... LAN, 50 ... External network connection apparatus (gateway), 60 ... WAN, 70 ... External telephone terminal, 80 ... SIP server, 100 ... Communication control part, 110 ... Telephone function part, 111 ... Terminal Control unit 112 ... Input / output processing unit 113 ... Call processing unit 114 ... Terminal data registration unit 120 ... Call control function unit 121 ... Distributed call control unit 122 ... Distributed call control unit 123 ... Distributed call control data Storage unit 130 ... Man-machine interface unit 140 ... Voice input / output unit 500 ... Distributed shared IP phone system 600 ... IP telephone network 1000 ... Extension management data 2000 ... Outside line management data

Claims (6)

In an IP telephone system comprising a plurality of IP telephone terminals connected to a network,
The IP telephone terminal has distributed call control execution means for executing call control to be shared in cooperation with other IP telephone terminals, and cooperates between predetermined IP telephone terminals among the plurality of IP telephone terminals. Distributed processing of the call control of the telephone system
Each IP telephone terminal transmits the command related to outgoing / incoming calls to one of the predetermined IP telephone terminals according to the content of the command related to outgoing / incoming calls. The IP telephone system according to claim 1,
The distributed call control execution means is any one of an external line process for processing an external line call via a WAN, an internal line process for processing an internal line call via a LAN, or a set value management for managing a set value of each IP telephone terminal. Means for performing
The telephone system includes one or more IP telephone terminals that execute the outside line processing, one or more IP telephone terminals that execute the extension processing, and one or more IP telephone terminals that execute the setting value management. An IP telephone system comprising: An IP telephone system according to claim 2, wherein
The IP telephone terminal that executes the external line processing temporarily registers the number of IP telephone terminals corresponding to the number of WAN addresses as terminals connected to the WAN, and there is an external line transmission request from another IP telephone terminal. If so, the IP telephone system is characterized in that the registration of the provisionally registered predetermined IP telephone terminal is canceled and the IP telephone terminal that has made the external line transmission request is registered as a connection terminal of the WAN. An IP telephone system according to claim 3, wherein
If there is an incoming call to an IP telephone terminal temporarily registered as a terminal connected to the WAN, the temporarily registered IP telephone terminal responds to the incoming call and executes the external line processing. An IP telephone system, wherein the incoming call is transferred to a predetermined IP telephone terminal according to an instruction. An IP telephone terminal having distributed call control execution means for executing call control to be shared in cooperation with other IP telephone terminals,
The distributed call control execution means has distributed call control program storage means for storing a distributed call control program for executing call control to be shared, and call control data storage means for storing data related to the distributed call control. And an IP telephone terminal that performs call control of a plurality of IP telephone terminals including its own IP telephone terminal in cooperation with other IP telephone terminals via a network. The IP telephone terminal according to claim 5, wherein
The distributed call control program storage means manages at least an outside line processing program for processing an outside line call via a WAN or an extension processing program for processing an outside line call via a LAN, or setting values of each IP telephone terminal. One of the set value management programs for storing an IP telephone terminal

Images